Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Turn ON or OFF TV with TV-B-Gone

Are you tired of LCD TV’s around you in public place, or restaurant. Tired of advertisements while you want to have peaceful time. Didn’t you think how good it would be to have magic remote control that could turn those annoying screens off. TV-B-Gone kit might be just what you need.   This fantastic remote can turn off almost all popular TV’s including latest plazma. Thanks to 4 IR LEDs used, distance may reach more than 100ft. The device uses Attiny85V microcontroller for storing 50 most common codes. You can download project files or buy a kit, and this way support author for nice ideas. Continue reading

Fun with Tengu project

Do you know what is Tengu? It is known as a toy which responds to music sounds and animates along with it. Tengu analyses sound and according to it’s loudness or other parameters it changes faces made of LEDs or other imaging device. Alex inspired by original Crispin Jones Tengu have decided to build one on his breadboard. He used a LED matrix for displaying face.   Tengu heart is an Atmega48 microcontroller running at 10MHz speed. Sound sensor is based on electret microphone from old mobile phone and LM386 operation amplifier. Sound is sensed on AVR ADC input and according to its level the face is updated on LED matrix. Simple and fun. Want to build one – project files are available. Continue reading

AVR Tiny G-force metter

While stumbling around Hackaday projects I found this interesting G-Force measuring project. Project aim was to measure lateral acceleration force of driver in car when turns when he turns right. According to author car can normally handle 0.8g of centrifugal force. Above this value car may slide to the sideways. Well this of course is a matter of tires used and other factors.     Measuring board contains: Atmel ATtiny26 microcontroller; 3×10 LED bars; ADXL103 accelerometer; and other necessary parts needed for correct performance. Program reads accelerometer value via ADC converter and indicates on one of 30 LEDs on the bars. There is simple lookup table implemented which corresponds to 1g(left) on first LED and 1g(right) on LED 30. The middle LED indicates the current G-force. Design can be improved… Continue reading

AVR tiny code lock

Code lock is used for access control. User has to enter 1 to 4 digit code (in free version) to unlock the door or several doors if needed. Code is entered via button keypad matrix. Optionally there can be LCD module connected.   For free light version author provides project schematic and hex file. If you see this project valuable you may purchase preprogrammed Attiny2313 with more codes and professionally made PCB. Check out the site for more interesting information including programmer, GSM alarm. Some of pages are in Slovakian language. Continue reading

Open source prototyping platform

Maybe You don’t know much about microcontroller programming, and you do not want to learn much about it but want to give a try on designing something interactive, Arduino projects is what you need. Arduino is an open source and open hardware project of simple prototyping platform. Main purpose of this platform is to make prototyping accessible for artists, designers, hobbyists and other who is interested in creating interactive objects. I like this projects because it makes microcontroller interfacing acceptable for everyone. Arduino boards are based on ATMEL Atmega8 and ATmega168 microcontrollers.   What makes this platform so easy? Programming of Arduino board is made by using Arduino programming language (based on Wiring). Language is very easy to use, because you don’t have to care about microcontroller ports and various… Continue reading

AVR USBtinyISP programmer and SPI interface

Seems like everyone is shifting their own ISP programmers from COM and LPT ports to USB. And there is a reason for this – computers arre getting mobile, LPT and COM ports becoming obsolete. But almost everywhere you can find USB port, so it is logical to have USB programmer rather then old style. ladyada have developed very tiny USB ISP programmer which also can serve as USB-SPI interface. Thisis really low cost and low component count programmer built under Attiny2313 AVR microcontroller. It is compatible with AVRDUDE and AVRStudio and works under Windows, Linux and MacOS.   This is not the fastest programmer but it can guarantee write speed of1 Kb/s and read speed of 2Kb/s. Other good feature is that it comes with both – 6 and 10… Continue reading